Mounting for heaters of a multicathode ray gun



July 2, 1968 M. DQRQTA 3,391,298

MOUNTING FOR HEATERS OF A MULTI'CATHODE RAY GUN Filed May 24, 1966 IN VE N TOR MICHAEL DOROTA ATTORNEY United States Patent 3,391,298 MOUNTING FOR HEATERS OF A MULTI- CATHODE RAY GUN Michael Dorota, Kinnelon, NJ. (P.O. Boonton, NJ. 07005) Filed May 24, 1966, Ser. No. 552,488 11 Claims. (Cl. 313-271) The invention relates generally to mountings for heaters and, specifically, to methods for mounting heaters.

It is an object of the invention to provide an easy method for mounting heaters.

It1s another object of the invention to provide a mountmg bracket that is neat, simple, easy to apply, durable and will reduce time and labor expended in manufacture.

These ob ects and advantages, as well as other objects and advantages may be attained by the device shown by way of illustration in the drawings in which:

FIGURE 1 is a side elevational view of a heater;

FIGURE 2 is a side elevational view of a multi-cathode ray gun assembly;

FIGURE 3 is an end view thereof; ingFIGURE 4 is a plan view of one form of heater mount- FIGURE 5 is a plan view of another form of heater mounting; and

FIGURE 6 is a plan view of still another form of heater mounting.

With the increasing volume of production of color television reception apparatus, the volume of manufacture of multiple-cathode ray guns for picture tubes grows greater. In the prevailing color television system such picture tubes have therein three cathode ray gui1s 11 each one supplying a color component of the picture iri the image tube. Each of the cathode ray guns is provided with a heater 12, which usually is a double helix with pairs of terminals 14 extending from one end. It is necessary that a source of power be connected to these heaters 12, in order to activate the cathode ray gun. The power supply is introduced through the base of a glass envelope (not shown), through which numerous terminals enter the glass envelope. A pair of these terminals constltutethe power supply for the heaters. It has been the frequent practice, since the introduction of multiple cathode ray guns, to connect the heaters together in parallel by a haphazard application of leads running from one of the terminals 16 to one of the terminals 14 of each of the heaters 12, and likewise from the other termmals 16 to the opposite terminals 14 of each of the heaters 12. The result has been that there has been no pattern or predetermined direction for these uninsulated leads, and often the only criteria for their direction has been the whim of the Worker and that they do not come into contact with each other. The result has been a weird haphazard appearance for each assembly and, in this re gard, no two cathode ray guns have been identical insofanas their heater constructions are concerned. Reco nlzmg this factor, numerous fixtures have been devise d to be attached to the power terminals in the base of the gun. These fixtures have a predetermined shape and are connected to the heater leads. A certain amouiit of complexity in shape has resulted from the use of these fixtures, which have been sometimes in the shape of L- shaped leads with semicircular fins, so as to otter connectmg surfaces which lie in the general area of the heater leads, thereby permitting relatively short connections to these terminal extensions.

. n has been found that leads (FIGURES 3, 4 lying in the same plane of regular, symmetrical configuration, dimensioned to intersect with the heater terminals, make a short and neat connection. The connection of the heater terminals to the power supply terminals becomes a mat- 3,391,298 Patented July 2, 1968 ter of simplicity, speed, convenience, with much less labor costs. In addition, if the terminals 14 are provided with hooked extensions 10 which embrace the leads 17, welding can be performed with great ease.

The haphazard wiring necessary for connecting the heater terminals to the power terminals is avoided, and a much neater, compact assembly is provided. Specifically, a pair of semi-circular leads 17, 17 may be connected to the power supply terminals 16. The leads lie in spaced relation to each other in a single plane, which is perpendicular to the central axis of the image tube, and is also generally perpendicular to the axis of the heater terminals 14, 1-4. These coplanar leads are arranged in parallelism with each other to surround a center from which the heaters may be radially equidistant. The leads may be concentrically circular in form, or concentric and triangular (FIGURE 6), concentric squares, concentric ellipses, concentric rectangles, or in numerous other forms, which are not shown. Regardless of what form the coplanar leads are given, it is essential the leads shall be in general registration with the heater terminals, so that they intersect therewith and may be easily welded thereto for completion of the heater circuit. The essential characteristics of the terminals for the heater of multiple cathode ray guns therefore are that these leads are disposed about a center from which the heaters are generally radially equidistant.

In FIGURE 4, the leads 17, 17 are shown to extend oppositely, i.e., one extends clockwise, and the other extends counterclockwise.

It has also been found that if the leads are formed integrally and both extending in a clockwise direction, as indicated by the dotted extensions 18 on the triangular leads 19 (FIG. 6), or on the circular leads 20 (FIG. 5), or in any other form in which the leads may be bent, the leads together have greater stability for attachment, and may be more easily welded to the power supply terminals, and the heater terminals. Then, when the attachment is completed, the extensions 18 may be snipped off, thereby leaving the heater connected in parallel. Rapidity and simplicity of manufacture are accomplished with drastically reduced costs. The broken lines in FIGURES 5 and 6 show the cut-off points.

The foregoing method is intended merely to be illustrative of the procedure for changes can be resorted to within the scope of the claims without departing from the spirit of the invention.

The foregoing description is merely intended to illustrate an embodiment of the invention. The component parts have been shown and described. They each may have substitutes which may perform a substantially similar function; such substitutes may be known as proper substitutes for the said components and may have actually been known or invented before the present invention; these substitutes are contemplated as being within the scope of the appended claims, although they are not specifically catalogued herein.

What is claimed:

1. A mounting for heaters of a multi-cathode ray gun in which:

a plurality of heaters are disposed in general symmetry about the longitudinal axis of the gun,

a pair of terminals of each heater is disposed on a common radius with respect to the axis,

the terminals of the heaters are disposed in general parallelism to the axis,

a pair of electric power supply terminals are mounted on the gun, comprising:

(a) a pair of generally parallel, coplanar leads, each one attached to one of the pair of power supply terminals respectively;

(b) each one of the pair of leads intersecting with 3 and connected to one of each of the pairs of heater terminals respectively.

2. The device according to claim 1, in which the ends of the leads opposite to those attached to the power supply terminals, are integrally connected together.

3. The device according to claim 1, in which the other ends of the leads opposite from the power supply terminals are integrally connected together, and designed to be separated from each other by severing the interconnection.

4. The device according to claim 1, in which the leads are formed integrally with each other.

5. The device according to claim 1, in which:

(a) the leads are generally circular;

(b) one extending clockwise; and

(c) the other extending counterclockwise.

6. The device according to claim 1, in which the leads are generally circular and both extend in the same direction.

7. The device according to claim 1, in which:

(a) the leads are generally circular;

(b) both leads extend in the same direction;

(c) the other ends of the leads opposite from the power supply terminals, are integrally connected together; and

((1) designed to be separated from each other by snipping ofi? the interconnection.

8. The device according to claim 1, in which:

(a) the ends of the heaters are bent into hooks, and

(b) the hooks embrace the leads at the point of inter- 30 section. 9. A method for mounting heaters of a multi-cathode ray gun in which a plurality of heaters are disposed in general symmetry about a central longitudinal axis; the heater terminals are positioned in radial pairs in general parallelism to the axis and the heater terminals ends, and the ends define terminals for connection to a power supply comprising:

(a) forming a length of conductor into a pair of concentric, generally parallel, coplanar, integral leads;

(b) dimensioning the leads for each lead to intersect with one heater terminals end from each heater;

(c) attaching the free ends of the leads to electric power supply terminals;

((1) attaching the leads to the heater terminals at the point of intersection;

(e) separating the integral leads by snipping off the interconnecting portion.

10. The method according to claim 9, in which the leads are generally circular.

11. The method according to claim 9 and, before attaching the heater terminals to the leads, the further steps of:

(a) forming a hook at the end of the heater terminals;

( b) hooking the ends of the heater terminal onto the leads at the points of intersection.

References Cited UNITED STATES PATENTS 5/1964 Brown 31327l 3/1966 Brown 313-271 

1. A MOUNTING FOR HEATERS OF A MULTI-CATHODE RAY GUN IN WHICH A PLURALITY OF HEATERS ARE DISPOSED IN GENERAL SYMMETRY ABOUT THE LONGITUDINAL AXIS OF THE GUN, A PAIR OF TERMINALS OF EACH HEATER IS DISPOSED ON A COMMON RADIUS WITH RESPECT TO THE AXIS, THE TERMINALS OF THE HEATERS ARE DISPOSED IN GENERAL PARALLELISM TO THE AXIS, A PAIR OF ELECTRIC POWER SUPPLY TERMINALS ARE MOUNTED ON THE GUN, COMPRISING: (A) A PAIR OF GENERALLY PARALLEL, COPLANAR LEADS, EACH ONE ATTACHED TO ONE OF THE PAIR OF POWER SUPPLY TERMINALS RESPECTIVELY; (B) EACH ONE OF THE PAIR OF LEADS INTERSECTING WITH AND CONNECTED TO ONE OF EACH OF THE PAIRS OF HEATER TERMINALS RESPECTIVELY. 